Generally, data that comes from two different sources, and has different values, aren't semantically equivalent, and so get assigned different types.

eg:

   type ImdbFilmReview extends FilmReview
   type RottenTomatoesFilmReview extends FilmReview

Which allows you to query for either "All film reviews", or just a subset.

We've found that actually covers about 80% of use cases.

However, some users have asked for more control in the query langugae, which we're working on improving the TaxiQL query syntax for this right now.

Here's what it looks like:

   find { Film[] } as {
     id : FilmId
     rottenTomatoesReviews : RottenTomatoes::FilmReview[]
     imdbFilmReview : Imdb::FilmReview[]
   }